WO1996024569A1 - Procede de purification du pentafluoroethane - Google Patents
Procede de purification du pentafluoroethane Download PDFInfo
- Publication number
- WO1996024569A1 WO1996024569A1 PCT/FR1996/000196 FR9600196W WO9624569A1 WO 1996024569 A1 WO1996024569 A1 WO 1996024569A1 FR 9600196 W FR9600196 W FR 9600196W WO 9624569 A1 WO9624569 A1 WO 9624569A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- perchlorethylene
- liquid
- mbar
- phase
- mixture
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C19/00—Acyclic saturated compounds containing halogen atoms
- C07C19/08—Acyclic saturated compounds containing halogen atoms containing fluorine
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/383—Separation; Purification; Stabilisation; Use of additives by distillation
- C07C17/386—Separation; Purification; Stabilisation; Use of additives by distillation with auxiliary compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
Definitions
- the invention relates to the purification of pentafluoroethane (F125) containing chloropentafluoroethane (F115) and more particularly relates to a purification process in which F115 is removed by liquid-liquid extraction or by extractive distillation and easily recovered for processing. subsequent in products harmless to the Earth's atmosphere.
- Pentafluoroethane is one of the possible substitutes for chlorofluorocarbons (CFCs) which are concerned by the Montreal protocol and are characterized by an exceptionally long lifetime allowing them to reach the upper layers of the atmosphere and thus participate under the influence of UV radiation to the destruction of the ozone layer. It is therefore obvious that their substitutes should, depending on the various production methods, contain only traces of these CFCs.
- the substitutes are generally obtained either by suitable fluorination methods which are not highly selective and can generate by disproportionation of perhalogenated compounds of the CFC type, or from CFC themselves by reduction methods, in practice by hydrogenolysis reactions.
- Pentafluoroethane can thus be prepared by fluorination of perchlorethylene or its intermediate fluorination products such as dichlorotrifluoroethane (F123) and chlorotetrafluoroethane (F124), or by hydrogenolysis of chloropentafluoroethane (F115).
- F123 dichlorotrifluoroethane
- F124 chlorotetrafluoroethane
- F115 chloropentafluoroethane
- the F125 produced contains non-negligible quantities of F115 which it is appropriate, the F115 being a CFC, to eliminate as completely as possible.
- the constituents of a binary mixture are separated using a so-called extraction column comprising successively, from the boiler to the head, three sections, one of exhaustion , the second of absorption and the third of recovery.
- the binary mixture to be fractionated is injected at the head of the exhaustion section while the third body acting as a selective solvent is introduced at the head of the absorption section so as to circulate in the liquid state from its point of introduction up to 'to the boiler.
- the third so-called recovery section is used to separate, by distillation, the least absorbed constituent, traces of solvent entrained under the effect of its non-zero vapor pressure.
- the present invention therefore relates to a process for the purification of a pentafluoroethane containing chloro-pentafluoroethane by extractive distillation or by liquid-liquid extraction, characterized in that perchlorethylene is used as an extraction agent.
- perchlorethylene as extraction solvent according to the invention is particularly advantageous to apply when one wants to purify an F125 obte ⁇ naked by fluoridation.
- the perchlorethylene used as extraction solvent is none other than the raw material used in the process for obtaining F125.
- the process according to the invention can be implemented according to the well-known principles of extractive distillation or liquid-liquid extraction, operating under pressures of between 2 and 20 bar absolute, the temperatures being given by the diagrams d liquid-vapor balance of the individual constituents and their mixtures.
- the charge (mixture F125-F115 to be separated) is injected by the line (1) at a point located at the head of the section of exhaustion and the perchlorethylene, introduced into the column by the pipe (2) at a point located at the head of the absorption section, circulates in the liquid state from its point of introduction to the boiler.
- the purified F125 at the head of the extractive distillation column is removed via line (3) and the bottom via line (4) is perchlorethylene enriched in F115.
- the diameter and the number of stages of the extractive distillation column, the reflux rate and the optimum temperatures and pressures can be easily calculated by a person skilled in the art from data specific to the individual constituents and to their mixtures ( relative volatilities, vapor pressures and physical constants). If one wishes to recycle perchlorethylene, one can use the device re ⁇ presented in Figure 2 which combines the extractive distillation column with a simple distillation column.
- the perchlorethylene enriched in F115 leaving the bottom of the extractive distillation column is sent via line (4) to the simple distillation column; F115 is recovered at the head via line (5) and perchlo ⁇ retylene is recycled to the extractive distillation column via line (2).
- S selectivity
- the molar composition of the gas phase makes it possible to calculate the partial pressure of F115 and / or F125.
- the solubility of F115 (s 115 ) and F125 (s 125 ) in the solvent is calculated from the molar composition of the liquid phase.
- solvent F1 14 (for comparison) or perchlorethylene (according to the invention) the six tests summarized below were thus carried out.
- the selectivity obtained with F114 is 2.49 and is much lower than that (4.0) obtained with perchlorethylene.
- a 204 ml stainless steel autoclave is used equipped with two dip tubes allowing a sample to be taken of the two phases present.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970705446A KR100353668B1 (ko) | 1995-02-07 | 1996-02-06 | 펜타플루오로에탄의정제방법 |
DE69609815T DE69609815T2 (de) | 1995-02-07 | 1996-02-06 | Verfahren zur reinigung von pentafluorethan |
AT96903059T ATE195502T1 (de) | 1995-02-07 | 1996-02-06 | Verfahren zur reinigung von pentafluorethan |
EP96903059A EP0808300B1 (fr) | 1995-02-07 | 1996-02-06 | Procede de purification du pentafluoroethane |
CA002210767A CA2210767C (fr) | 1995-02-07 | 1996-02-06 | Procede de purification du pentafluoroethane |
JP52403696A JP3892037B2 (ja) | 1995-02-07 | 1996-02-06 | ペンタフルオロエタンの精製方法 |
US08/875,945 US6307115B1 (en) | 1995-02-07 | 1996-02-06 | Method for purifying pentafluoroethane |
AU47226/96A AU709531B2 (en) | 1995-02-07 | 1996-02-06 | Process for the purification of pentafluoroethane |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/01381 | 1995-02-07 | ||
FR9501381A FR2730228B1 (fr) | 1995-02-07 | 1995-02-07 | Procede de purification du pentafluoroethane |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996024569A1 true WO1996024569A1 (fr) | 1996-08-15 |
Family
ID=9475903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000196 WO1996024569A1 (fr) | 1995-02-07 | 1996-02-06 | Procede de purification du pentafluoroethane |
Country Status (11)
Country | Link |
---|---|
US (2) | US6307115B1 (fr) |
EP (1) | EP0808300B1 (fr) |
JP (1) | JP3892037B2 (fr) |
KR (1) | KR100353668B1 (fr) |
CN (1) | CN1102563C (fr) |
AT (1) | ATE195502T1 (fr) |
AU (1) | AU709531B2 (fr) |
DE (1) | DE69609815T2 (fr) |
ES (1) | ES2151144T3 (fr) |
FR (1) | FR2730228B1 (fr) |
WO (1) | WO1996024569A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003068716A1 (fr) * | 2002-02-14 | 2003-08-21 | Pcbu Services, Inc. | Procedes de purification et de production de fluorohydrocarbures |
WO2007013680A1 (fr) * | 2005-07-28 | 2007-02-01 | Showa Denko K.K. | Procede pour extraire du pentafluoroethane, et methode de production de pentafluoroethane impliquant le procede susmentionne |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7189311B2 (en) * | 2001-03-23 | 2007-03-13 | Honeywell International Inc. | Purification of difluoromethane |
CA2571448C (fr) * | 2004-06-23 | 2010-08-17 | Exxonmobil Chemical Patents Inc. | Procedes de separation de composants de melanges |
US7893176B2 (en) * | 2007-03-23 | 2011-02-22 | Exxonmobil Chemical Patents Inc. | Polydispersity-controlled isoolefin polymerization with polymorphogenates |
US7402636B1 (en) | 2007-03-23 | 2008-07-22 | Exxonmobil Chemical Patents Inc | Method and apparatus for decreasing polymer deposition |
FR3035104B1 (fr) | 2015-04-14 | 2017-04-07 | Arkema France | Procede de purification du pentafluoroethane |
JP6930524B2 (ja) * | 2016-02-26 | 2021-09-01 | Agc株式会社 | 精製1−クロロ−2,3,3,3−テトラフルオロプロペンおよび精製1−クロロ−2,3,3,3−テトラフルオロプロペン(z)の製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0472391A1 (fr) * | 1990-08-21 | 1992-02-26 | Imperial Chemical Industries Plc | Procédé pour la purification de 1,1,1,2-tétrafluoréthane |
WO1995021147A1 (fr) * | 1994-02-07 | 1995-08-10 | E.I. Du Pont De Nemours And Company | Procede de separation du pentafluoroethane d'un melange d'hydrocarbures halogenes et de chloropentafluoroethane |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU684757B2 (en) * | 1993-05-25 | 1998-01-08 | Showa Denko Kabushiki Kaisha | Purification process of pentafluoroethane |
-
1995
- 1995-02-07 FR FR9501381A patent/FR2730228B1/fr not_active Expired - Fee Related
-
1996
- 1996-02-06 ES ES96903059T patent/ES2151144T3/es not_active Expired - Lifetime
- 1996-02-06 JP JP52403696A patent/JP3892037B2/ja not_active Expired - Fee Related
- 1996-02-06 CN CN96193019A patent/CN1102563C/zh not_active Expired - Lifetime
- 1996-02-06 DE DE69609815T patent/DE69609815T2/de not_active Expired - Fee Related
- 1996-02-06 AT AT96903059T patent/ATE195502T1/de not_active IP Right Cessation
- 1996-02-06 WO PCT/FR1996/000196 patent/WO1996024569A1/fr active IP Right Grant
- 1996-02-06 US US08/875,945 patent/US6307115B1/en not_active Expired - Fee Related
- 1996-02-06 KR KR1019970705446A patent/KR100353668B1/ko not_active IP Right Cessation
- 1996-02-06 AU AU47226/96A patent/AU709531B2/en not_active Ceased
- 1996-02-06 EP EP96903059A patent/EP0808300B1/fr not_active Expired - Lifetime
-
2001
- 2001-06-26 US US09/891,867 patent/US20020040172A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0472391A1 (fr) * | 1990-08-21 | 1992-02-26 | Imperial Chemical Industries Plc | Procédé pour la purification de 1,1,1,2-tétrafluoréthane |
WO1995021147A1 (fr) * | 1994-02-07 | 1995-08-10 | E.I. Du Pont De Nemours And Company | Procede de separation du pentafluoroethane d'un melange d'hydrocarbures halogenes et de chloropentafluoroethane |
Non-Patent Citations (1)
Title |
---|
"Methods for Separating Chloro-Carbons from Hydrofluoroalkanes", RESEARCH DISCLOSURE, vol. 360, HAVANT GB, pages 191 - 193 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003068716A1 (fr) * | 2002-02-14 | 2003-08-21 | Pcbu Services, Inc. | Procedes de purification et de production de fluorohydrocarbures |
US7060165B2 (en) | 2002-02-14 | 2006-06-13 | Pcbu Services, Inc. | Processes for purification and production of fluorocarbons |
CN100368365C (zh) * | 2002-02-14 | 2008-02-13 | 大湖化学公司 | 氟代烃的纯化与生产方法 |
WO2007013680A1 (fr) * | 2005-07-28 | 2007-02-01 | Showa Denko K.K. | Procede pour extraire du pentafluoroethane, et methode de production de pentafluoroethane impliquant le procede susmentionne |
US8003832B2 (en) | 2005-07-28 | 2011-08-23 | Showa Denko K.K. | Process for recovering pentafluoroethane, and production method of pentafluoroethane involving the process |
Also Published As
Publication number | Publication date |
---|---|
KR100353668B1 (ko) | 2002-12-31 |
DE69609815T2 (de) | 2001-03-15 |
AU709531B2 (en) | 1999-09-02 |
US6307115B1 (en) | 2001-10-23 |
EP0808300B1 (fr) | 2000-08-16 |
KR19980702051A (ko) | 1998-07-15 |
CN1102563C (zh) | 2003-03-05 |
JP3892037B2 (ja) | 2007-03-14 |
ES2151144T3 (es) | 2000-12-16 |
EP0808300A1 (fr) | 1997-11-26 |
US20020040172A1 (en) | 2002-04-04 |
AU4722696A (en) | 1996-08-27 |
FR2730228A1 (fr) | 1996-08-09 |
ATE195502T1 (de) | 2000-09-15 |
DE69609815D1 (de) | 2000-09-21 |
JPH10513190A (ja) | 1998-12-15 |
FR2730228B1 (fr) | 1997-06-20 |
CN1180345A (zh) | 1998-04-29 |
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